MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_UTM_REDIRECTOR_LINK heuristics. The ML classifier and ClamAV also flagged this file as malicious. The primary malicious URL identified is dafemum.ru, which is used in a phishing lure disguised as a worksheet. No scripts were extracted, but the presence of malicious links suggests a phishing attempt to download further malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
Heuristics 5
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://dafemum.ru/123?utm_term=fraction+to+decimal+to+percent+worksheet+table In PDF document text
- https://cdn.sqhk.co/zivuputid/9XKUNu0/learn_english_conversation_app_download.pdfIn PDF document text
- https://cdn.sqhk.co/difanemifal/0UXMnkR/13250096201.pdfIn PDF document text
- https://s3.amazonaws.com/jiwisi/call_of_cthulhu_roleplaying_game_reddit.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417212/normal_6067a2c9e115d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457847/normal_60117c0231a60.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426974/normal_602ba23792876.pdfIn PDF document text
- https://s3.amazonaws.com/pafiganovavi/82929131702.pdfIn PDF document text
- https://cdn.sqhk.co/tefozakozup/xDdeiiS/schoolsfirst_fcu_mobile_banking.pdfIn PDF document text
- https://cdn.sqhk.co/fusajovogi/jexiajI/political_lobbying_definition_economics.pdfIn PDF document text
- https://cdn.sqhk.co/nowonipewo/hQBwjil/34343286710.pdfIn PDF document text
- https://cdn.sqhk.co/fexivijemozu/WwgcJeq/proper_use_of_ironing_board.pdfIn PDF document text
- https://s3.amazonaws.com/firudegix/general_electric_company_annual_report_2019.pdfIn PDF document text
- https://cdn.sqhk.co/vumojakizaw/82hbglr/descargar_libro_aura.pdfIn PDF document text
- https://cdn.sqhk.co/kajipazuto/hjia4je/barbershop_vs_hair_salon.pdfIn PDF document text
- https://cdn.sqhk.co/kobewudojuvo/Igijjia/luperawesinazuguxipus.pdfIn PDF document text
- https://cdn.sqhk.co/xumesapaxoku/gjbiirC/space_shooter_gift_codes_2020.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460066/normal_6047f053a26f1.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://zetusemikaso.rf.gd/tovupijemonevawaxebep.pdfIn PDF document text
- http://gilasorizarer.rf.gd/mixuxorezuwu.pdfIn PDF document text
- http://luzirilokupozar.rf.gd/vavidilotuwesibarome.pdfIn PDF document text
- http://bexituxupogetav.rf.gd/namafot.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000db1e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDB1E | 5352 bytes |
SHA-256: 253586262504af6cf7ad9d7a0c02fb30d0e8774225ca426631f292b624c7a767 |
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font_01_sfnt_off0000ed21.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xED21 | 10388 bytes |
SHA-256: a66d9656b028225402f6cd4447efa966a9398817ce484ec6ca63ac1029adc09a |
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font_02_sfnt_off000110c7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x110C7 | 4324 bytes |
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378 |
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